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Finding the Fourth Proportional to 978,429.20, 1,467,643.80 and 679,830.80

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Solution

The fourth proportional to 978,429.20, 1,467,643.80 and 679,830.80 is: 1,019,746.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,429.20 : 1,467,643.80 = 679,830.80 : x
  2. Step 2: Convert to fraction form
    978,429.20/1,467,643.80 = 679,830.80/x
  3. Step 3: Cross multiply
    978,429.20x = 1,467,643.80 × 679,830.80
  4. Step 4: Simplify right side
    978,429.20x = 997,749,458,669.04
  5. Step 5: Solve for x
    x = 997,749,458,669.04/978,429.20
  6. Step 6: Final answer
    x = 1,019,746.20

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